Framework .NET - Error al Instalar Framework.net 3.5

estimados, estoy instalando Visual C# y en la seccion en donde instala el Framework.net aparece una ventanita diciendo que se a producido un error irrecuperable y que la aplicacion ce cerrará, me da la opcion de ver un LOG y esto es lo que despliega:

[12/13/08,00:05:42] Microsoft .NET Framework 2.0: [2] Error: Installation failed for component Microsoft .NET Framework 2.0. MSI returned error code 1603
[12/13/08,00:06:42] WapUI: [2] DepCheck indicates Microsoft .NET Framework 2.0 is not installed.
[12/13/08,14:18:19] Windows Communication Foundation: [2] Error: Installation failed for component Windows Communication Foundation. MSI returned error code 1603
[12/13/08,14:18:29] WapUI: [2] DepCheck indicates Windows Communication Foundation is not installed.
[12/13/08,14:19:58] Windows Communication Foundation: [2] Error: Installation failed for component Windows Communication Foundation. MSI returned error code 1603
[12/13/08,14:20:07] WapUI: [2] DepCheck indicates Windows Communication Foundation is not installed.
[12/13/08,14:22:08] Windows Communication Foundation: [2] Error: Installation failed for component Windows Communication Foundation. MSI returned error code 1603
[12/13/08,14:22:18] WapUI: [2] DepCheck indicates Windows Communication Foundation is not installed.
[12/14/08,22:12:59] Windows Communication Foundation: [2] Error: Installation failed for component Windows Communication Foundation. MSI returned error code 1603
[12/14/08,22:13:09] WapUI: [2] DepCheck indicates Windows Communication Foundation is not installed

por favor AYUDAAAAAAAAAAAAAA!!!!!!!!

gracias...

Estoy en la misma, cualquier ayuda se agradece.

Que tal
Necesitan antes de instalar el Visual, instalar el framework 3.5, para ello deben ir a la parte de download de windows que es... (ya busco...)

http://www.microsoft.com/downloads/details.aspx?familyid=333325FD-AE52-4E35-B531-508D977D32A6&displaylang=en

y luego instalen el service pack 1 que resuelve varias cositas y creo que tenia un par de cositas extras:

http://www.microsoft.com/downloads/details.aspx?FamilyID=ab99342f-5d1a-413d-8319-81da479ab0d7&displaylang=en

Por otro lado, recuerden realizar una desinstalación de la hecha de manera erronea.

Saludos desde Argentina

Gabriel Brancolini